Cooking utensil.



'-'No.avo,81a, r PATENTBDNov.12,'19o7.

' L.- G. PAGERSTBN..

COOKING UTENSIL.

APPLICATION Hmm MAY 9.1907.

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NITED STATES PATENT OFFICE.

LORENZO G. FAGERSTEN, OF CHICAGO, ILLINOIS.

COOKING UTENSIL.-

l To all whom it may concern:

Y of the UnitedStates, residing at Chicago, county of Be it known that I, LORENZO G. FAGnRsTEN, a citizen Cook, :State of Illinois, have invented a certain new and useful` Improvement in Cooking Utensils, and declare: the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art towhieh it pertains to make'and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates t the art of cooking food, and more particularly to a. utensil wherein food may be i initiallyheated and the cooking thereafter lcompleted by of the heat stored up in the utensil.

Various schemes have b een proposed for 'preparing lvfood inthis manner, but no arrangement has heretofore been :devisedfor conveniently and satisfactorily baklin g,.groiisting or frying foods, since the temperatures necessary for this purpose are quite high. It has been .proposed'to use `a cooking utensil containing a body ,'Ofywaterwhich isinitially heated and then removed rom theame or other heating device and allowed to stand` in order to let'the heat stored up in the water act upon'the food after the utensil has been removed from the `influence of the source of heat. The temperatureto: which water maybe heated at normal pressn'reis much below that which is necessary to effect roasting, or baking, and, in order to secure the -lreqiiisite temperatureswith water, it would be neces- Y'sary to cause the water to boil under enormous pressure.

It lis evident that a `utensil made strong enough to withstand the pressure of water boilingiat 400 degrees i F. o`r more would have to be madeso heavy as to be entirely uri-suited for use in an ordinary kitchen. lf it is attempted to -use metals of low melting points such as lead` or alloys instead of water a high temperature at normal pressures may be obtained out the heat capacity `of such'lmetals is so low` that theweight of a utensil having- `suiicient heat capacity to thoroughly bake,

roast oriry food will be prohibitive. The. object of my invention is to provide a cooking V utensil of the character described, wherein high degrees of temperature may be obtained without the use of dangerous pressureswithin the utensil and without making theutensil so heavyas to make it cumbersome; A further object of ,my invention is to provide a utensil of the character described which shall be durable and which shall be so constructed that no care need -be exercised in removing 'the foodthererom or during Specication of Letters Patent. Application filed May 9, 1907. Serial No. 372.716. n

Patented Nov. 12, 1907.'

nal section of a utensil arranged in accordance with the preferred form of my invention.

Referring to the drawing, 1 indicates a pot or reeep taele of any suitable size and shapehavingat its upperl edge a laterally projecting flange 2. 3 is areeeptaele smaller in size than the receptacle l having also a laterally projecting flange 4. .The small receptacle is adapted to 'be inserted-within the other end to be supported in the proper relation thereto by means of the engaging flanges. The flanges may be securely united in any convenient manner so that there is formed between the inner wall of the outer receptacle and the ouer wall of *the` inner receptacle, a hermctieally sealed space. The receptaclesmay be made of any suitable materials, such asV are `ordinarily employed in the manufacture of light cooking utensils and., if desired,

the interior of the inner receptacle and the exterior of the outer receptacle -may be covered with suitable enamel'or othermaterialfwhich gives a hard smooth finish'. It will be seen that the compound receptacle may be -tilted or inverted, or it may be immersed in water Without in any way endangering the contents within the space between the two members and withl out danger that the `material within this space will get into food which is contained in or' being removed from thel inner receptacle.

In accordance with my invention I Iill, or partially lill, the space between the two receptacles with some material l0 which shall be fairly light, which can be raised to a. high degree of temperature without produc, ing a high pressure in the inclosure and which shall have a highlheatcapacity so that when' lood is placed into the receptacle and' is'initiall y heated to a high temperature by any suitable source o f heat supply, the completion of the cooking may be effected bythe heat which is stored lup in 'the utensil; so that the utensil may berenioved fromtho source of heat supply and be allowed to stand until the food is entirely cooked.' n

`l have found that excellent results may be obtained by using crystallized chemical compounds, preferably those which contain considera-ble Water' as water of crystallization.` One of such V'substances is calcium chlorid, Whose. crystalcomposition .is CaClz-i-GH'ZO.

This substance contains a huge amount of water, as'

`Water of crystallization, and may be heated to fairly high temperatures without driving out any ol' the water.'

This substance melts at about 86 degrees F. sont' it grec of temperature may be maintained-within -the ,-utensilwithout fear of thecreation of dangerous pres- "f lxeing'lcap'able of being raised to a temperature boiling point of water at normal pressure.

` obtain" 4 ouglii Euitlieriuorefthe heat capacity of the utensil v h so that not only may hightemperaturos be lo'it' tho -final cooking may bc thory donc the apparatus' is removed from the rce of hcabsiipply. 'L 'g utensil preferably provided with a cover or lid 5 n 'with' abaillgxvhcreby itmay be carried about. Tlibailuna'y befattached'in any suitable manner, as

gage eyes `8- in two oi the connecting. screws 9 for the ilanges.

ll ill now be seen thatl have provided alight and vco'nli'lac tensil which maybe conveniently handled hereinfood 0i any desired character may be c 'lt din-any desired way Without requiring any undue v alnfonnt'oi" attention'on the part ot' the cook.

'While [have described my invention as embodied in azpreferred form', and-have enumerated-a specific niaterial'which can-be 'used to advantage as the heat. rc-

laincr, I do not desire-to be limited to the particular coi'lstruction shown or'tothe particular heat retaining material' specified, since in its broader aspects my invention nia'y be carried out in other forms'as will b e evident iron-i the definitions comprised in the appended` claims.` i

avin'g now ,fully described my invent-ion, what 1 claim as new, and desire to secure by Letters Patent is: "1`. In afoot-)king utensil, a food-containing receptacle, a jacket surrounding and secured to the. food-containing ,receptacle in .such a manner as to form a hermetically -sealed -inclosureabout the food-containing receptacle,'and

a heat-storing material contained Within said inclosure, said material having a highl specific heat and being ca- ;pableot being raised to a high temperature at normal pressure.y

2.*1n a cooking utensil having a food containing space, hermetically sealed inclo'sure surrounding said space,

f and a heat-storing" material located in said inclosure,

said heat storing Hnaterial having a high specific heat and above the Sqln a cooking utensil, a `food-containing receptacle lhaving a'iiange at its upper'end, a larger receptacle also -r -said receptacles.

12. A cooking utensil having a` food containing space, a

a heat-storing material contained within saidinc1osure said material having a high, specific heat and being capable of being raised to a vtemperature` higher than the boiling'point of water -at normall pressurel 4. A cooking utensil having a .food-containing space, a hermetically sealed inclosure surrounding said space, a heat-storing material located in said space, said material having a high specic heat and being capable of being raised to a temperature higher lthan the boiling point of water at normal pressure. l I

hermetlcally'sealed inclosure surrounding said space, and a crystallized heafstoring material' containing aA large amount of vwater of crystallization arranged in said iniorjexample by means of hooks 7 at 1ts ends which en- 7. In a cooking utensil, a food-containing receptacle', a

larger receptacle surrounding it, and a solid crystallized heatfstoring material having a large amount of Water.

of crystallization located between said receptacles,

. S. ln a cooking utensil, va food-containing receptacle, a larger receptacle surrounding it, and a quantity of calcium chlorid crystals,4 having a rlarge amount of water of crystallization contained in the .space between said receptacles.

.f). A cooking utensil having a food-containing space, a lhermetically sealed inclosure surrounding said space1 and-acrystallized heat-storing material containing a large amount of Water of crystallization and having a low melting point arranged in said inclosure.

10. vIn a cooking utensil, a food containing receptacle; a larger receptacle surroundingit and a crystallized heat-storing'material arrangedin a space between said receptacle; said heat storing material containing a large amount of water of crystallization, having a low melting pointand being capable of being raised to a temperature `above the boiling point of water without losing its Water of crystallization. v

. 11. ln a cooking utensil, a food containing receptacle-a. larger receptaclesurrounding it, a quantityof calcium chlorid crystals containing water of crystallization and a quantity of zinc-chlorid contained in the space betwee l 5.v A cooking utensil having a food-containing space, a

herinetically sealed' inclosure surrounding said space, a.

crystallized heat storing material'containingwater in the formof-Water -of crystallization arranged in said lnclosure, and a quantity of deliquescent material also arranged within said inclosure.l

`In testimony whereof, I -sign this specification in'tlie presence of two witnesses 1 i LORENZO drriennsTEN.

' WM. lf. FREuDnNnuICH,

HARRY S. GAIT'Hmn 

